It’s not Britain’s addiction to junk food that is chiefly to blame for our obesity crisis, but our love affair with the car, a report will claim this week.

Researchers have found that when households take possession of a car the time they spend walking falls from an average of nearly two hours to less than one hour a week.

Experts are still arguing over what is generating Britain’s growing obesity crisis - more food or less exercise? The report from the Institute for European Environmental Policy claims to show that the main cause is falling activity levels - and the biggest culprit is not less time spent at the gym or playing sport, but simply walking around less. Click here for full article